Both VT-d and FBC enabled that caused display flicker issue very randomly. According to sighting report, it recommend to disable FBC to workaround this issue.
Cc: Ville Syrjälä <[email protected]> Cc: Rodrigo Vivi <[email protected]> Cc: Mika Kuoppala <[email protected]> Cc: Jani Nikula <[email protected]> Cc: William Tseng <[email protected]> Signed-off-by: Lee Shawn C <[email protected]> --- drivers/gpu/drm/i915/display/intel_fbc.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/display/intel_fbc.c b/drivers/gpu/drm/i915/display/intel_fbc.c index 135f5e8a4d70..327af428d73f 100644 --- a/drivers/gpu/drm/i915/display/intel_fbc.c +++ b/drivers/gpu/drm/i915/display/intel_fbc.c @@ -1443,7 +1443,8 @@ static bool need_fbc_vtd_wa(struct drm_i915_private *dev_priv) { /* WaFbcTurnOffFbcWhenHyperVisorIsUsed:skl,bxt */ if (intel_vtd_active() && - (IS_SKYLAKE(dev_priv) || IS_BROXTON(dev_priv))) { + (IS_SKYLAKE(dev_priv) || IS_BROXTON(dev_priv) || + IS_COMETLAKE(dev_priv))) { drm_info(&dev_priv->drm, "Disabling framebuffer compression (FBC) to prevent screen flicker with VT-d enabled\n"); return true; -- 2.17.1 _______________________________________________ Intel-gfx mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/intel-gfx
